FISHES OF THE PHOENIX AND SAJVIOAN ISLANDS 161 



below eye ; dorsal dark brown, slightly bluish on spines, dusky on 

 edge ; anal dark brown with two dark blue streaks and a dusky edge ; 

 pelvics and pectoral dark brown ; caudal blackish with a trace of a 

 pale line at edge; length of specimen 109 mm., after Jordan and 

 Seale and checked with specimen; dorsal rays about VI, 28; aual II, 



28; pectoral I, 16 Naso brevirostris (Valenciennes) 



176. Ground color plain brownish, dorsal with a white marginal line, then 

 a dark blue or blackish submarginal line, rest of fin light brown, 

 anal similar to dorsal ; in life dorsal and anal with oblique bluish 

 streaks ; three specimens about 60 mm. long plain pale brownish in 

 alcohol, with three rows of large blackish spots, upper row faintest 

 below and along base of dorsal with seven spots; one from above 

 eye to caudal peduncle with seven spots and lower from behind eye 

 to middle of caudal peduncle with five spots; a single spot occurs 

 obliquely backward above base of pectoral ; caudal, pectoral, and 

 pelvic tins same color as body ; uorssal fin with black blotches cori-e- 

 spondiug to rows of spots on body and area beyond these spots more 

 or less a dusky band followed by a whitish line at margin; anal 

 with a white marginal line, then a dusky to blackish submarginal 

 streak fading into plain pale brownish color below; dorsal rays VI, 

 27 to 29 ; aual II, 28 or 29 ; pectoral I, 17 Naso unicornis (Forskftl) 



Genus CTENOCHAETUS Gill 



Ctenochaetus Gill, Proc. U. S. Nat. Mus., vol. 7, p. 279, 1884. (Type, Acanthurvs 

 strigosus Bennett.) 



CTENOCHAETUS STRIGOSUS (Bennett) 



Acanthurus strigosus Bennett, Zool. Journ., vol. 4, p. 41, 1828. 



115160, Canton Island, lagoon, April 23-May 12, 1939, 1 specimen. 



115158, Tutuila Island, reef at entrance Pago Pago Bay, June 2, 1939, 16 

 specimens. 



115157, Tutuila Island, reef at Alofau, June 3, 1939, 12 specimens. 



115159, Tutuila Island, reef at Pagai, June 4, 1939, L. P. Schultz and Frank 

 Taiga, 57 specimens. 



115156, Tau Island, reef at Siulagi Point, June 27, 1939, 2 specimens. 

 115155, Rose Island, reef, June 11-14, 1939, 31 specimens. 

 115154, Rose Island, lagoon, June 12-20, 1939, 1 specimen. 



115152, Hull Island, reef, July 13, 1930, 1 specimen. 



115153, Hull Island, channel, July 7-17, 1939, 1 specimen. 

 52347, Apia, Samoa, Jordan and Kellogg, 12 specimens. 



Genus ACANTHURUS Forskal 



Acanthurus Foeskal, Descriptiones animalium . . ., p. 59, 1775. (Type 

 Chaetodon sohal ForskS.1, "later restricted by authors to the first species 

 named, Ch. unicornis," according to Jordan and Evormann's "Genera of 

 Fishes," p. 33.) 



ACANTHURUS GLAUCOPAREIUS (Bloch) 



Harpurus glaucopareius Bloch, in Schneider, Systema ichthyologiae . . ., p. 

 212, 1801. 



115163, Rose Island reef, June 11-14, 1939, 5 specimens. 



115164, Hull Island reef, July 2-15, 1939, 3 specimens. 



